Onchocerciasis

Infection transmitted by the bite of infected blackflies causing severe itching and eye lesions as the adult worm produces larvae and leading to visual impairment and permanent blindness.

The filarial worms (O. volvulus) are transmitted by the repeated bites of infected black flies (Simulium spp.) . These black flies breed in fast-flowing rivers and streams, mostly in remote villages located near fertile land where people rely on agriculture.

In human, female adult worms produce embryonic larvae (microfilariae) that migrate to the skin, eyes and other organs. When a female black fly bites an infected person during a blood meal, it also ingests microfilariae which develop further into the infectious L3 stage and are then transmitted to the next human host during subsequent bites.

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550 maps found
Region Countrysort descending Program stage Years Maps Data
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Senegal MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Senegal MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Senegal MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Senegal MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Senegal MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Senegal MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Senegal Endemicity 2017 Download map png Download map
Eastern Africa Seychelles Endemicity 2017 Download map png Download map
Eastern Africa Seychelles MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Seychelles MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Sierra Leone Endemicity 2017 Download map png Download map
Western Africa Sierra Leone MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Sierra Leone MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa South Africa MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa South Africa Endemicity 2017 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa South Africa MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa South Sudan Mapping Surveys (Nodule Palpation) 1996 - 2008 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Eastern Africa South Sudan MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa South Sudan Endemicity 2017 Download map png Download map
Eastern Africa South Sudan MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa eSwatini MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa eSwatini MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa eSwatini Endemicity 2017 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Skin Biopsy) 2014 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Nodule Palpation) 1996 - 2012 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) Endemicity 2017 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa The Gambia Endemicity 2017 Download map png Download map
Western Africa The Gambia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa The Gambia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Togo MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Togo MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Togo MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Togo Endemicity 2017 Download map png Download map

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